<!-- 数据报表页面 -->
<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 2.为echarts准备一个具备大小(宽高)的dom -->
      <div id="main" style="width: 750px;height:400px;" ref="echart"></div>
    </el-card>
  </div>
</template>

<script>
// 1.导入绘制图表工具echarts
import echarts from 'echarts'
import _ from 'lodash'

export default {
  name: 'Report',
  components: {},
  data () {
    return {
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  methods: {
    async drawLine () {
      var main = this.$refs.echart
      const { data: res } = await this.$http.get('reports/type/1')
      if (res.meta.status !== 200) {
        return this.$message.error('获取折线图数据失败！')
      }
      if (main) {
        const myChart = echarts.init(this.$refs.echart)
        const result = _.merge(res.data, this.options)
        myChart.setOption(result)
      }
    }
  },
  computed: {},
  watch: {},
  created () {

  },
  // 此时页面上的元素已经被渲染完毕了
  mounted () {
    this.drawLine()
  }
}
</script>
<style scoped>

</style>
